California-based REX Real Estate Exchange expanded its services to Austin on Tuesday, April 3, headquartered at 5540 North Lamar Blvd., Austin. The brokerage company uses artificial intelligence, big data and machine learning to target buyers and provide a digital alternative to the traditional real estate model. In addition to Austin, REX also announced its expansion into Denver and San Francisco on April 3. 855-342-4739. www.rexchange.com